Preheater



R. W. WIEDERWAX.

PREHEATEH.

APPLICATION FILED APR. 6. I92o.

31a/vento@ www 61 no: m13

Patented Jan. 3, 1922.

2 SHEETS-SHEH l.

narran star' rarest carica.

ROBERT vv. WIEDERWAX, 'or ATLANTIC CITY, NEWKJERSEY, Assienon oF CNE-HALF To CARLTON GEIsT, or ATLANTIC CITY, NEW JERSEY.

PBEHEATER.

Application inea Aprilv e,

To all whom it 'may concern.'

Be it known that LROBERT 'W. WinnenwAX,`a citizen of the United States, residing at Atlantic City, in the county of Atlantic and State ofNew Jersey, have invented fcertain new and. useful Improvements in Preheaters, of which the following is a speciiication.

This invention relates to preheaters, and more particularly to preheaters particularly adapted for use in 'heating castings preparatory to welding the same. l

l As is well known, in welding castingsl by means of the oxyacetylene torch, it is necessary to preheat the castings to prevent warping and cracking of the same duringv the welding operation. Heretofore, this has been accomplished by means of building up furnaces within which the casting was placed and surrounded by charcoal or -the like, which is ignited and allowed to burn until the casting has been heated. Y I havedevised ail-apparatus whereby ordi-- nary illuminating gas or the like may be utilized for p'reheating castings. This deviceconsists broadly of a casing having arranged therein a mass of small pieces of refractory aggregates;V Arranged below the casing and provided with outlets extending upwardly into the casin'gandinto the refrac- .tory aggiegrates therein are banks of gas burner tubes, through'which the combustible fuel is admitted. T he combustible fuel passes upwardly through the aggregates and when ignited, burns therebetween 'causing the 'aggregatesto become rapidly incandescent. p

In' the accompanying drawings forming" a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a longitudinal section taken through an apparatus embodying my inven= tion r Y Figure 2 is a section taken on line 2;-2A of Figure 1,

Figure 3 is a section takenon line of Figurel, support bars being omitted for the purpose of-clarity, Y

Figure 4 is a fragmentary perspective specification of Lettersratem.' Patented Jan, '3, 13,922,

i920. serial No. 371,689.

showing the manner of supporting the support bars, and,

.Figure 5 is a sectional view showing a slightly modified form of Vmy invention, wherein the 'support bars are formed integral with the gas burner tubes of the banksl In 'the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 desig-` casing. Each bank of gas burner tubes is4 connected with a feeding conduit 15,'and each burner tube is provided with a governing valve 16, by means of'rwhich the admission of the gaseous fuel to the tube is governed. A common feed pipe 17 is provided, which is detachably connected, as at 18, to the conduits 15.' It will be seen that, as the yplates 13 are 'detachably connected to the casing and the conduits 15 areV detachably connected with the feederv :conduit 17, that either of the banks of gas burner tubes may be readily removed for repairing oithe like.

t will be noted that the upper surfaces of the gas burner tubes are disposed beneath the bottom flange 19 of the casing and that these tubes have projecting upwardly therefrom outlets 2O which extend into the casing andare provided upon their upper ends with removable vca `s 21, for a purpose presently to appear. upports 22 are provided, which extend beneath the gas burner tubes 14C adj acent the outer ends thereof. These supports have their upper end bent upwardly, as at 23, and again outwardly, as at 24, the portion 24 resting upon the lower flange 19 of the casing wall. By inspecting Figures 1 and 2, it will be seenthat the supports 22 extend longitudinally of the banks of gas burner 'Y ved to be in any manner limiting.

tubes and transversely of the tubes them-k Vshort tubes adjacent the outer ends thereof..

The short tubes of each bank are disposed opposite the long tubes of the other bank, and these tubes therefore, combine to form practically an unbroken surface across the open bottom of the casing. The gas outlets 20 of the-long tubes are staggered with rela.- tion to those of the short tubes and the fuel is thus very thoroughly disseminated throughout the area of the casing. This dissemination is completed by the refractory aggregates 26 which are arranged within the casing and which cause the fuel to flow through tortuous passages formed by the particles of the aggregate within the casing.

It will be obvious that in order to support the aggregates so as to allow' the admission of airfor combustion and at the same time prevent the aggregates from passing between the gas burner tubes 11i, some further support other than the tubes themselves is necessary. For this purpose, the construction shown vin Figures 4 and 5 has been adopted. In

Figure 4r, the auxiliary supports are shown in Vthe form of angle irons 27, having their ends disposed upon and supported by the bottom flange'l9 of the casing, the angle irons being arranged parallel to andy intermediate each pair of gas burner tubes. Theseangle irons should be of such size that their upper sur- -facesare disposed below the upper `ends of the gas outlet tubes 20. ln the form shown in Figure 5, the supports 27 are formed integrally with the gas burner tubes 14. rlhis is accomplished by providing the gas burner tubes with co-acting flanges which extend into proximity tol one another but provide spaces, as at 28, through which air for cornbustion may be admitted. It will be obvious kthat the flanges need not be formed upon the base of the gas burner tubes, as shown,

but might conveniently be formed elsewhere and that the illustration shown is not intend- The upper face of the casing of the preheater is provided with a plurality of spaced transverse bars 28. These bars are secured to the casing in any suitable manner. It is to be understood that the forms of my invention herewith shown and described are to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts maybe resorted to without departing from the spirit of my invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

luIn apparatus of the type described, a casingV having an open top and bottom, a plurality of gas burner tubes arranged adjacent the open bottom of said casing and coacting to form a grid, refractory aggregates within said casing and supported by said grid, an inwardly extending Vflange formed on said casing, ancha member arranged transversely of said gas burner tubes and contacting the lower face thereof to support the tubes, said member having portions resting upon the flange of said casing.

2. In apparatus of the type described, a casing having an open top and bottom and provided with an internal flange, a plurality of spaced gas burner tubes arranged adjacent the open bottom of said casing and provided with upwardly extending outlets and supports having their ends resting upon said flange arranged intermediate the outlet tubes of said gas burner tubes, and refractory aggregates within said casing and resting upon said gas burner tubes andV said supports.

3. In apparatus of the type described, a casing having an open top and bottom and provided with an internal flange, a plurality of 'spaced gas burner tubesV arranged adjacent the open' bottom of said casing and provided with upwardly' extending outlets, and supports having their ends resting upon said flange arranged intermediate the outlet tubes of each of said gas burner tubes and the outlet tubes of'l the next adjacent gas burner tubes. Y Y

4l. In apparatus of the type described, a vcasing having an open top andbottom and provided with an internal flange, a plurality of gas burner tubes arranged beneath said casing and provided with upwardly extend-Y ing outlet tubes, supports arranged inter- 'inediate said outlet tubes and having their ends resting upon said ilange, said supports being free from connection with said casing and being held against transverse displacement by said outlet tubes, and refractory aggregates within said casing resting upon said supports. v

5. .In apparatus of the type described, a casing having an open top and bottom and provided with an internal flange, a plurality of gas burner tubes arranged beneath said casing and provided with upwardly extending outlettubes, supports 'arranged intermediate said outlet tubes and having their ends resting upon said flange, said supports being` free from connection with said casing and being'held against transverse displace-V ment by said outlet tubes, and refractory aggregates within said casing resting upon said supports, saidoutletv tubes terminating above said supports.

6. In apparatus of the type described, a casing having an open top and bottom, ak plurality of gas burner tubes arranged adjacent the open bottom of said casing and coacting to form a grid, a. plurality of transverse supporting members arranged beneath saidiburner tubes and actlngfas a support therefor, said supporting members bengsecured to the walls of the casing and being Y positioned below the open bottom of the casing, and refractory aggregates Within said easing and supported by said grid.

7. In apparatus of the type described, a easing having an open top and bottom, a plurality of supporting members arranged beneath the bottom of the easing, the ends of said supporting members being extended upwardly and secured to the Walls of the oasing, a plurality of gas burner tubes arranged on said supporting members and co-aoting to form a grid, and refractory aggregates Within said casing and supported by said grid.

In testimony whereof I affix my signature in presence 0f two Witnesses.

ROBERT W. WIEDERWAX.

lWitnesses: l

GRACE B. SEUCE, Josm W'ILsoN. 

